Pod Breakdown, Yield, and Grade of Virginia Type Peanuts as Affected by Ca, Mg, and K Sulfates1
- D. L. Hallock and
- Kenneth H. Garren2
Above-normal rates of gypsum (CaSO4-2H2O), up to 3,090 kg/ha broadcast in early bloom stage, on peanut (Arachis hypogea L.) plants of the ‘Virginia bunch 46-2’ cultivar reduced pod breakdown, a destructive preharvest disease, in 2 out of 3 years, 1964 –66. Gypsum increased fruit yields and percent sound mature seeds and decreased percent extra large seeds and percent fancy size pods in 1964 and 1965. In all 3 years, gypsum increased percent Ca in pods, and decreased percent K in pods and percent externally damaged seeds.
In 1965, 1,345 kg/ha MgSO4 broadcast on plants in early bloom stage increased pod breakdown and percent externally damaged seeds and decreased percent Ca in pods.
K2SO4 at 1,510 kg/ha in 1965, and 1,010 and 2,020 kg/ha in 1966, increased pod breakdown, percent K in pods, and percent externally damaged seeds. K2SO4 also decreased fruit yield and percentages of extra large and sound mature seeds, fancy size pods, and Ca in pods.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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