Võ Minh Kha, Nguyễn Văn Đới (trang 51-54)
Từ khoá: yếu tố, hạn chế, năng suất, lúa, đất phù sa, sông Thái Bình
Limiting factors on rice yield of 8-10 ton/ha on alluvial soils of the Thai Binh river
Limit factors were nitrogen and phosphorus. Applying for each crop a just right quantity of calcium, magnesium, and potassium in recommended to maintain soil fertility, also using dolomite or thermophosphate to supply calcium, magnesium.