Summary Fertilization of black gram with nitrogen (20 kg N/ha) in the form of urea produced a 32% increase in yield over control, and significantly improved nutritional quafity of seeds by increasing crude protein, crude fat, methionine, calcium, phosphorus and iron contents without increasing polyphenoIs. The highest yield of black gram was obtained when plants were supplied with phosphorus at a rate of 40kg P2Os/ha. Crude protein, crude fats, phosphorus and iron contents increased whereas calcium content decreased significantly at 40 kg P2Os/ha. A continuous increase in polyphenol content was observed with increasing levels of phosphorus but it was significantly increased at P rates above 40kg/ha. Fertilization with N and P in a 1:2 ratio at 20 kg N/ha and 40kg P2Os/ha produced a 32% seed yield increase and improved the nutritional value of black gram seeds.

SummaryThe effect of CaCO 3 and organic matter on the availability of iron and manganese was studied on sorghum (Sorghum bicolor). Addition of calcium carbonate caused significant decrease in dry matter and grain yield. But yields tended to increase with the addition of organic matter at the rate of 15 t/ha. The iron concentration decreased with the addition of CaCO 3 at all the stages of crop growth. Like iron, concentration of manganese also decreased with the increase in added CaCO 3. Organic matter increased the iron concentration both at seedling and flowering stage. The concentration of manganese was, however, dependent on the stage of the crop.

No abstract

No abstract