Open Access Original Research Article

Soil Chemical Properties as Influenced by Long Term Manuring and Nitrogen Fertilization in Bangladesh

Fahamida Akter, Md. Mizanur Rahman, Md. Ashraful Alam

Asian Journal of Soil Science and Plant Nutrition, Page 1-9
DOI: 10.9734/ajsspn/2019/v4i430049

Organic fertilizers are enriched in plant nutrients which may enhance the soil chemical properties. However, studies on the effect of long term fertilization on soil chemical attributes is yet lacking in Bangladesh. Therefore, an experiment was conducted to assess the changes of soil chemical properties as influenced by long term manuring and nitrogen fertilizer in silt clay loam soil under rice-wheat cropping system. The experimental plot received different organic materials for the last 26 years (1988-2014). Five types of organic materials treatments such as control (no manure), cowdung, compost, green manure and rice straw were applied at the rate of 0, 25, 25, 7.5 and 1.5 t ha-1, respectively in a yearly sequence. Three levels of nitrogen viz. 0, 75 and 100 kg ha-1 for rice and 0, 80 and 120 kg ha-1 for wheat were applied in this study. Long term application of different organic materials positively increased soil organic carbon and total N, P, S and decreased pH and K, Ca and Mg availability. Increase in soil organic carbon was found maximum under green manure and lowest in rice straw applied soil. The green manure contributed to the maximum accumulation of soil nitrogen. N dose of 80 kg ha-1 was found effective in increasing availability of soil nutrients.

Open Access Original Research Article

Long Term Effects of Integrated Plant Nutrition System on Rice Yield, Nitrogen Dynamics and Biochemical Properties in Soil of Rice-rice Cropping System

Md. Imran Ullah Sarkar, Afsana Jahan, Md. Mozammel Haque, S. M. Mofijul Islam, Md. Nayeem Ahmed, Md. Rafiqul Islam

Asian Journal of Soil Science and Plant Nutrition, Page 1-14
DOI: 10.9734/ajsspn/2019/v4i430050

Long term fertilization from manure and fertilizer influences crop yield as well as soil nutrient cycling. Therefore, a field experiment was conducted from 2010 to 2014 in order to observe the long term effects of integrated application of manure and fertilizers on rice yield, soil nitrogen dynamics and soil biochemical properties. The field experiment was carried out in a rice-fallow-rice cropping pattern under wetland condition with four fertilizer management practices: NPKS fertilizer as soil test based (STB), Cow dung (CD) @ 3 t ha-1 + NPKS as integrated plant nutrition system (IPNS) [CD+IPNS], Poultry manure (PM) @ 2 t ha-1 + NPKS as IPNS [PM+IPNS] and N control. The rice grain yield, soil N dynamics and the biochemical properties assessed in our study significantly varied with the organic sources used in IPNS system. The annual grain yield of double cropped rice with PM+IPNS was similar to the STB treatment over the five cropping years while CD+IPNS responded from the third year. After five years of rice cropping PM+IPNS showed better impact on soil nitrogen dynamics and biochemical properties compared to STB fertilizer management. Considering the soil health, our study suggests that PM+IPNS could be a good practice for sustainable rice production in long run reducing the use of chemical fertilizer.

Open Access Original Research Article

Soil Fertility Levels in Bangladesh for Rice Cultivation

Jatish C. Biswas, N. Kalra, M. Maniruzzaman, M. M. Haque, U. A. Naher, M. H. Ali, W. Kabir, S. Rahnamayan

Asian Journal of Soil Science and Plant Nutrition, Page 1-11
DOI: 10.9734/ajsspn/2019/v4i430051

Determination of soil fertility with minimum data set for crop zoning and devising fertilizer recommendations as well as soil fertility evaluation method based on soil properties. The data were collected from existing literatures and scoring was done on 0–100 scale. The lowest score was assigned for the minimum value of tested attributes and then gradually higher scoring values. Arithmetic, weighted, geometric and most minimum of mean scores were calculated and their performances were compared with grain yield of dry season irrigated (Boro) rice. Soil fertility in 10-12 and 39-52% areas in Bangladesh are very low and low, respectively. Medium fertile and fertile soils are distributed in 17-41% and in about 8% areas of the country. About 55% soils scored 70–95 (medium to high SOC) and the rest belongs to inferior quality. In some areas P build up has taken place (25% areas), but widespread K mining. Sulphur and Zn status in about 40% areas are low to very low (scored <35 and <40). Soils of the major areas of the country are with low pH (5.0-6.0) and CEC in the range of 15-25 cmolc kg-1. Weighted mean score and most minimum of eight attributes score showed good relationships with dry season irrigated rice yields than other tested methods indicating that this technique can be used for soil fertility rating in tropical countries.

Open Access Original Research Article

Effect of Powdered and Composted Meat Bones on the Growth and Yield of Water Spinach (Ipomoea aquatica)

Badhon Ahmmed, Tamzid Bin Shafique, Shaikh Motasim Billah

Asian Journal of Soil Science and Plant Nutrition, Page 1-10
DOI: 10.9734/ajsspn/2019/v4i430052

For agriculture, the most important is the soil’s function as a base and medium for plant growth. The soil health and soil condition are important for plant growth. And the management of soil organic matter is an important part in case of managing soil health and maintaining soil conditions. The experiment was carried out in the field lab (Net House) of Soil, Water and Environment discipline, Khulna University, Bangladesh. Total 21 plastic pots were used to continue the experiment with 7 treatments. For the experiment, the meat bones were collected and used in the experimental pot along with soil in different doses. This research has revealed that meat bones both powdered and composted, has significantly increased (about 20-25%) the growth parameters of water spinach (Ipomoea aquatica) such as a number of leaves, shoot length, fresh weight, dry weight and moisture content. So, the application of powdered and composted meat bones in soil will contribute in the growth of water spinach (Ipomoea aquatica).

Open Access Original Research Article

The Effect of Solid (Granular) and Liquid (Foliar) Fertilizers Application on the Growth and Yield of Maize (Zea mays L) in Soils of Obubra, Cross River State, Nigeria

E. A. Akpa, L. J. Agah

Asian Journal of Soil Science and Plant Nutrition, Page 1-8
DOI: 10.9734/ajsspn/2019/v4i430053

The research was carried out in the month of April, 2018 to determine the effect of solid (granular) and liquid (foliar) fertilizers application on the growth and yield of maize in soils of Obubra. Five (5) composite soil samples were collected at the depth of 0-20 cm for the analysis of physical and chemical properties before application of the fertilizers. The experimental layout was randomized Complete Block Design (RCBD) with three treatments and five replications in a plot area of 25 m x 20 m (500 m2) which corresponds to 0.05 ha-1. The plot was designed and blocked into subplots, each measuring 6 m x 4 m (24 m2). Each block was separated from the other with a distance of one meter (1 m) apart and between subplots 0.5 m apart. Three treatments made up of treatment one (T1) zero application at 0 kg ha-1, treatment two (T2) liquid (foliar) N.P.K 20:20:20 at the rate of 100 mil of N, 50 mil of P2O5, 33.3 mil of Mp ha-1 and treatment three (T3) solid (granular) N.P.K 20:20:20 at the rate of 44.4 kg of N, 40 kg of P2O5 and 33.3 kg of Mp  ha-1 were replicated five times making a total of fifteen (15) subplots. Parameters of plant heights and number of leaves were observed at 6 and 8 weeks after planting. Plant heights, number of leaves, number of cobs, weight of 1000 seeds in each subplot and weight of grain after shelling were analyzed respectively. Results on soil analyses showed that the soil texture was sandy loam with deficiencies in primary nutrients and other nutrients. On the plant heights, the result was significant (P≤0.05) and on the number of leaves, the result for 6 weeks was not significant (P≥0.05) while that of 8 weeks was significant (P≤0.05). On the number of cobs, 1000 seeds and weight of grain after shelling were also significant (P≤0.05). The solid (granular) fertilizer showed to be more effective than liquid (foliar) fertilizer and should therefore be recommended for the growth and yield of maize in the area.