Effects of Humic Acid Applications on Yield and Some Characteristics of Processing Tomato

Foliar and soil fertilization of humic acid affect productivity and quality of tomato

“…In 2004, all HA applications improved the early yield of tomato while only 20 ml/l foliar HA application increased statistically the early yield compared to control in 2005 (Table III). Similar findings, that HA applications improved growth and some fruit characteristics of tomato were reported by Adani et al (1998), Ocal (1999), andDursun et al (2002). Moreover, Dogan and Demir (2004) indicated that HA application resulted in higher early yield compared to control.…”

“…The effects of humic acid treatments on quality characteristics of tomato fruit are summarized in Table II Padem and Ocal (1999) who showed that foliar HA applications increased the AA content of tomato fruits. Dogan and Demir (2004) reported that HA treatments did not affect pH of tomato fruits.…”

“…Positive effects of humic substances on plant growth and yield have been well documented for tomato (David et al, 1994;Adani et al, 1998;Padem & Ocal, 1999;Dursun et al, 2002;Dogan & Demir, 2004;Turkmen et al, 2004). However, most of these studies were conducted either in aggregate culture, bag culture, solution culture or hydroponics culture.…”

Growth, yield, and calcium and boron uptake of tomato(Lycopersicon esculentum L.) and cucumber (Cucumis sativus L.) asaffected by calcium and boron humate application in greenhouse conditions

“…The highest tomato yield (159,682 kg ha -1 ) was obtained from 2936 mg kg -1 Ca humate application, while the highest cucumber yield (172,992 kg ha -1 mineral supply, independently from nutrition (Chen and Aviad, 1990;Dursun et al, 2002). Many researchers have stated that humic substances lead to a remarkable increment in soil organic matter, improving plant growth and increasing crop production (Padem and Ocal, 1999;Abd El-Aal et al, 2005;Mahmoud and Hafez, 2010). …”

Arıtma çamuru ve humik asit uygulamalarının mısırın gelişimi, besin elementi ve ağır metal içerikleri ile bazı toprak özelliklerine etkileri

“…Birçok araştırıcı HA'in bitki büyümesi ve gelişimine olumlu etki yaptığını, düşük miktarlarda uygulandığında ise gelişimi pozitif yönde etkilediğini; bununla beraber çok miktarda uygulandığında etkisiz veya olumsuz oldukları anlaşılmıştır (Chen & Aviad 1990;Padem & Öcal 1999;Çimrin et al 2001). Araştırmacılar HA'in bitkilerde hücre zarının geçirgenliğini arttırarak besin elementlerinin alımına yardımcı olduğunu ifade ederek (Valdrighi et al 1996); yapılarındaki hormon benzeri maddelerden dolayı bitki gelişmesine olumlu etki yaptığını bildirmişlerdir (Caseneva de Sanfilippo et al 1990).…”